Finding the Fourth Proportional to 10,139.08, 13,990.54 and 5,662.26

Step by Step Solution

1. Step 1: Write the proportion equation
   10,139.08 : 13,990.54 = 5,662.26 : x
2. Step 2: Convert to fraction form
   10,139.08/13,990.54 = 5,662.26/x
3. Step 3: Cross multiply
   10,139.08x = 13,990.54 × 5,662.26
4. Step 4: Simplify right side
   10,139.08x = 79,218,048.06
5. Step 5: Solve for x
   x = 79,218,048.06/10,139.08
6. Step 6: Final answer
   x = 7,813.14